- United States
- Free calculator
Side Hustle Tax Checker for US Students
Check whether you need to tell the tax office about side income, and get a rough idea of the tax.
An estimate, not tax advice. It is based on the 2025 Schedule SE and IRS guidance checked on 18 October 2026. The IRS publishes a new form each year, so check the current one. Nothing you enter is saved or sent anywhere.
How this checker works
- Your net profit is your side income minus your business costs.
- Your net earnings from self-employment are 92.35% of your net profit (line 4a of Schedule SE).
- If your net earnings are less than $400, you do not owe self-employment tax (line 4c). In terms of profit, that is about $434.
- Self-employment tax is 12.4% for Social Security plus 2.9% for Medicare, 15.3% in total, on your net earnings. This estimate assumes your total earnings are below the Social Security limit, which is true for most students.
- Half of your self-employment tax is deductible when you work out your income tax (line 13).
- The IRS says individuals, including sole proprietors, generally have to make estimated tax payments if they expect to owe tax of $1,000 or more when their return is filed.
What it does not include
- Federal or state income tax. Whether you need to file a return depends on your total income and situation. The IRS Interactive Tax Assistant can help you check.
- The 0.9% Additional Medicare Tax for higher earners, the optional methods on Schedule SE, and wages from a job that use up the Social Security limit.
- Nonresident alien rules. If you are on an F-1 or J-1 visa, ask your school's international student office before you earn money.
Sources
- IRS: Schedule SE (Form 1040), 2025
- IRS: Instructions for Schedule SE (Form 1040)
- IRS: Self-employment tax (Social Security and Medicare taxes)
- IRS: Estimated taxes
- IRS: Interactive Tax Assistant
Figures last checked on 18 October 2026. They change, so check the official source before you act.
Read the guide: do college students pay taxes on side hustle money?
Also available for: UK
This calculator gives estimates for general information. It is not financial, legal or tax advice.